"People have heard me talk about this on air," he said, referring to his mastectomy and clinical depression. "It's been recently diagnosed as emotional lability, which means that I can't control my ups and downs ... and when I feel that way, and I'm at home, I sneak food."

In 1999, Williams was diagnosed with multiple sclerosis, a degenerative autoimmune disease that also causes mood swings and depression. Links between mood and eating have been made as researchers have found that hormones in our stomachs communicate directly with our brain.